3 papers
gr-qc2019
Intrinsically symmetric cosmological model in the presence of dissipative fluids
E. Bittencourt, L. G. Gomes, G. B. Santos
Based upon the intrinsic symmetries approach to inhomogeneous cosmologies, we propose an exact solution to Einstein's field equations where the spatial sections are flat and the so…
gr-qc2018
On the effective acoustic geometry for relativistic viscous fluids
E. Bittencourt, V. A. De Lorenci, R. Klippert +1
Hadamard-Papapetrou method of field discontinuities is here employed in order to determine the effective metric that describes the propagation of acoustic perturbations in isentrop…
gr-qc2016
More about scalar gravity
E. Bittencourt, U. Moschella, M. Novello +1
We discuss a class of models for gravity based on a scalar field. The models include and generalize the old approach by Nordström which predated and in some way inspired General Re…